Labradar Recoil Sensor

[FRB6.5]

I've had the Piet recoil switch for two years. The false readings are easily distinguishable by the large velocity discrepancy.

Not always, especially with lower velocities such as from a Grendel with a short barrel. I've had false readings withing 200 FPS, close enough to look plausible but wrong enough to wreak havoc with the data.

I just drop the bolt then arm. It has been perfectly reliable this way.